JPH0855644A - Electric wire connector - Google Patents

Abstract

PURPOSE:To provide an electric wire connector with simple structure and easy production process by locking a thick plate-shaped pressing fixture and a narrow plate-shaped contact fixture to a projection and a fitting hole for connection. CONSTITUTION:Projections 7, 7 are formed on contact surfaces with pressing fixtures 1, 2 of narrow plate-shaped contact fixtures 4, 5 each made of a conductive material such as copper and aluminum. Fitting holes 6, 6 are formed on the flat surfaces of the thick plate-shaped pressing fixtures 1, 2 made of material with lower expansion coefficient than that of contact fixtures 4, 5, such as iron and stainless steel. The projections 7, 7 are fit to the fitting holes 6, 6 to lock the contact fixtures 4, 5 to the pressing fixtures 1, 2. A connecting electric wire is interposed between contact surfaces 8 of the contact fixtures 4, 5, and a fastening bolt 9 is inserted into an insertion hole 3 in the central part of the pressing fixtures 1, 2, and fastened for connection. By this constitution, work of the pressing fixtures 1, 2 and the contact fixtures 4, 5 is simplified, and an electric wire connector with simple structure and high electric performance can be provided.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention is used for connecting electric lines. For example, at a branch point from a low voltage main line of an overhead distribution line to a branch line or a branch point to a customer, the electric wires are clamped in parallel and connected by bolts. Regarding the electric wire connector.

[0002]

2. Description of the Related Art Conventionally, as this type of electric wire connector, a clamper made of copper, aluminum or the like for clamping a bus bar and a branch line on both sides is provided, and an iron material having a coefficient of thermal expansion lower than that of the clamper, a metal fitting such as stainless steel is provided on the outside. Wire clamps, which are clamped together with bolts and nuts (Japanese Patent Publication No. 37-101).
16)).

Alternatively, there is an electric wire contact metal fitting that comes into contact with a connection electric wire and a clamp fitting metal fitting which is fitted to the outside in a wedge shape, and the central part of the metal fitting is tightened with a tightening bolt (see Japanese Utility Model Publication No. 42-13065).

Further, as an electric wire connector which can be connected with an insulation coating as it is, copper having saw-tooth cut-through blades at both ends,
A cut-through blade body made of aluminum or the like and a tightening plate with parallel grooves on both sides are provided. The cut-through blade body is detachably fitted in the parallel groove of the tightening plate, and the entire circumference of the blade is insulated. Insulated wire connector surrounded by
923).

[0005]

In the above-mentioned conventional electric wire connector, the use of a holding metal fitting having a lower expansion coefficient than that of the clamp has an effect of suppressing overheating, but it is difficult to mold the clamp. Since it is separated from the pressing fitting, the tightening work is complicated.

Further, in the case where the side portions of the pressing fitting and the contact fitting are fitted in a wedge shape so as not to be separated from each other, the wedge shape processing is troublesome and is not suitable for mass production, and the pressing fitting and the contact fitting are unidirectional. Since the fastening bolts are inserted so as not to move by locking only, and the contact fittings include unnecessary current-carrying portions, the material wasted.

Further, the structure in which the horizontal portion of the cut-through blade main body is detachably attached to the parallel groove of the tightening plate is only for facilitating the exchange of the cut-through blade main body. In addition, it has a complicated structure in which it is fixed with a tightening plate and an insulating layer in order to stop the movement of the attached blade and to insulate it from the outside. Further, since the coefficient of expansion of the outer insulating layer in contact with the cut-through blade is larger, the contact portion becomes loose during heat generation and the vicious cycle of further overheating is followed to cause a problem in electrical performance.

The present invention solves the above-mentioned problems, and suppresses overheating by superposing a pressing metal fitting having a low expansion coefficient, such as an iron material, from the outside against a contact metal fitting such as a copper material or aluminum and tightening the metal fitting. By utilizing the fact that the pressing metal fittings need a rigid body, it is thick, and by making a simple plate shape, it is possible to stably engage the protrusions provided on the contact metal fittings simply by making holes in the pressing metal fittings. Since the contact metal fittings do not need to be fitted and inserted into the tightening bolts in the center part, unnecessary power-carrying parts are removed, and by forming a narrow plate shape, press molding can be performed integrally with the protrusions, and the structure is simple, An object is to provide an electric wire connector which is easy to manufacture.

[0009]

SUMMARY OF THE INVENTION An electric wire connector of the present invention comprises a contact fitting made of a conductive material such as a copper material or aluminum having a connecting surface for holding a connecting wire, and the contact fittings contacting both outer sides of the contact fitting. In an electric wire connector in which iron and stainless steel holding metal fittings 1 and 2 having a low expansion coefficient are tightened and connected by a tightening bolt inserted into the insertion hole 3 in the central portion, the upper and lower holding metal fittings 1 and 2 are formed as thick plates. In addition, one or a plurality of fitting holes 6 are formed at appropriate positions before and after the central insertion hole 3, the contact fittings 4 and 5 are formed into a narrow plate shape, and the contact surfaces with the holding fittings 1 and 2 are provided. One or more protrusions 7 are provided on the
Before and after, a plurality of contact fittings 4 and 5 can be joined by locking the projection 7 in the fitting hole 6.

[0010]

According to the structure of the present invention, a projection is provided on the contact surface of the plate-like contact fitting with the pressing fitting, and a fitting hole with the projection of the contact fitting is provided on the plane of the thick plate-like pressing fitting. By fitting, the contact metal fitting and the press fitting are stably locked, the connecting wire is sandwiched between the contact surfaces of the contact metal fitting, and the tightening bolt is inserted into the center of the press fitting to fit the nut or the press fitting. It is a wire connector that has a simple structure by tightening and connecting with screw holes, etc., and can exert an excellent effect of naturally suppressing overheating due to energization.

[0011]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS In FIGS. 1 to 5, reference numerals 1 and 2 are upper and lower press fittings made of iron, stainless steel or other rigid thick plate whose expansion coefficient is lower than that of a contact fitting to be described later. A through hole 3 for the bolt 9 is drilled, a square fitting hole 6 is drilled in the front-rear center of the bolt hole 9, and a recess 12 for a guide fitting 11 described later is provided in the center of the front-rear surface. The insertion hole 3 has an elliptical shape. Since the press fittings 1 and 2 are plate-shaped, they can be pressed in one direction.

Numerals 4 and 5 are plate-shaped and narrow contact metal fittings made of copper or aluminum, for example, which are provided with a connecting surface 8 for connecting the main line and the branch line on the lower surface thereof, and which will be described later in the central portion of the upper surface thereof. A recess 13 into which the guide fitting 11 is fitted is formed, and at the center thereof, one projection 7 is integrally formed. This contact fitting may be machined in one direction, like the pressing fitting. Although the connection surface 8 of the contact fittings 4 and 5 is an arc surface in the embodiment, the connection surface is not limited to this, and the connection surface may have a blade shape so as to be connected to the cut electric wire in the insulation-coated electric wire. It's easy.

The fitting holes 6 formed in the pressing fittings 1 and 2 may be circular holes or elliptical shapes, but they are square shapes to facilitate fitting and locking with the rectangular projections formed on the plate-like contact fittings. By doing so, the contact metal fitting does not rotate with respect to the holding metal fitting, and both the hole and the projection can be locked by one piece. In the embodiment, the holding metal fitting 1,
The fitting hole 2 has a square shape, and the projections 7 of the contact fittings 4 and 5 are formed into a chevron shape and press-fitted by a press or the like so that they are not fitted to each other during assembly or connection work. By the tightening of the tightening bolt 9, the pressing metal fitting and the contact metal fitting are naturally overlapped with each other, so that there is a margin in the mutual locking dimension and the processing is easy.

Numeral 9 is a tightening bolt which is inserted into the central bolt insertion hole 3 of the holding metal fittings 1 and 2, and is made of a material having an expansion coefficient other than that of the holding metal fittings, the receiving metal fitting 14, the conical spring 15 for temporarily fixing the electric wire, The dish washer 16 is interposed and the nut 10 is tightened and fixed. A constant torque cap made of resin, which breaks at a required tightening torque, is temporarily fixed to the nut 10.

Reference numeral 11 denotes a U-shaped guide fitting, which is provided between the lower holding fitting 2 and the concave portion 13 of the contact fitting 5,
It is a guide that restrains the side surfaces of the upper pressing metal fitting and the contact metal fitting on both sides thereof to prevent mutual rotation, and in the case of a particularly thin electric wire, regulates the electric wire so as not to be tightened at a portion other than the connection surface 8. In this embodiment, since the protrusion 7 of the contact fitting 5 is provided at the center, it is necessary to form an insertion hole 11a for inserting the protrusion 7 on the bottom surface of the guide fitting.

FIGS. 6 and 7 show another embodiment of the holding metal fittings and the contact metal fittings. The holding metal fittings 1 and 2 are provided with rectangular fitting holes 6, 6 on the front and rear sides, respectively. 4,5
Has mountain-shaped projections 7 formed integrally on both sides of the upper surface. The insertion hole, the recess, and the recess of the contact fitting of the holding fitting are the same as those in the above embodiment.

The numbers of the fitting holes of the upper and lower press fittings and the projections of the contact fittings are not limited to those in the above embodiment.
Further, although the number of the contact fittings is one, it is also possible to use a plurality of pairs in order to enhance the contact effect.

According to the electric wire connector of the present invention, the main wire and the branch electric wire are opened by using the elastic force of the conical springs 15 to open and close the upper and lower holding fittings, and clamp them between the connecting surfaces 8 of the contact fittings 4 and 5, and the tightening bolt 9 is tightened. Tighten the constant torque cap 17 until it breaks, compress the conical spring 15 to press the dish-shaped metal fitting 14, pinch the upper and lower pressing metal fittings 1, and the contact metal fitting 4,
Tighten and connect the wire with 5.

[0019]

According to the present invention, a plate-shaped contact fitting,
By using a thick-walled plate-shaped metal fitting having a lower expansion coefficient, the contact metal fitting and the metal fitting can be fitted securely with one or more protrusions and one or more fitting holes. Since both are plate-shaped, the protrusions, fitting holes, etc. can be processed by pressing once from one direction, and an electrically excellent electric wire connector with simple processing and a simple structure can be obtained. In particular, if it is used as a connector for an overhead power distribution line, mutual overheating accidents can be prevented and stable power supply can be achieved for a long period of time.

[Brief description of drawings]

FIG. 1 is a partially cutaway front view showing an electric wire tightening device of the present invention.

FIG. 2 is a cutaway side view of the same portion.

FIG. 3 is a plan view of the same.

FIG. 4 is a perspective view of a retainer.

FIG. 5 is a perspective view of a contact fitting.

FIG. 6 is a perspective view of another embodiment of the press fitting.

FIG. 7 is a perspective view of another embodiment of the contact fitting.

[Explanation of symbols]

 1 Press fitting 2 Press fitting 3 Bolt insertion hole 4 Contact fitting 5 Contact fitting 6 Fitting hole 7 Protrusion 8 Connection surface 9 Tightening bolt 10 Nut

Claims (1)

[Claims] 1. A contact fitting made of a conductive material such as copper or aluminum having a connecting surface for holding a connecting wire, and an iron material having a lower expansion coefficient than the contact fittings abutting both outer sides of the contact fitting, a holding fitting made of stainless steel ( In the electric wire connector in which (1) and (2) are tightened and connected by a tightening bolt inserted into the insertion hole (3) in the central part, the upper and lower holding metal fittings (1) and (2) are thick plate-shaped and 1 in the proper place before and after the insertion hole (3)
Alternatively, a plurality of fitting holes (6) are formed, and contact fittings (4) are provided.
(5) has a narrow plate shape, and the holding metal fittings (1) and (2)
One or a plurality of projections (7) are provided on the contact surface with and the plurality of contact fittings (4) and (5) are provided before and after the holding fittings (1) and (2) with the projection (7) and the fitting hole (6). An electric wire connector characterized in that it can be connected by being locked with.